PBS
Pbs Learning Media: Laser Waterfall
In this video from the Encyclopedia of Physics Demonstrations, students will observe how a laser beam is trapped in a water jet because the light reflects against the surface of the water. [1:03]
The History Cat
The History Cat: Geography: Places: Venezuela's Angel Falls
The Angel Falls in Venezuela is a UNESCO world heritage site and the highest waterfall in the world. Its unique features are described here.
InterKnowledge Corp.
Geographica.com: Adventure in Argentina
This site from Geographica.com contains information on a variety of parks in Argentina. A description of each follows the name of the park.
Other
Welcome Argentina: Iguazu Falls
Basic information on taking a trip to beautiful Iguazu Falls. This natural attraction in South America borders Argentina, Brazil, and Paraguay. For more information about that region of Argentina, and some vivid images, click on the the...
Other
Yellowstone National Park: Geysers
Describes what a hot spring is, where they form, why the water is hot, minerals in the water, crystal and color formation, and life forms such as bacteria in the water.